I've been using these instead of the brand name bags for a couple of years. They are thick and durable. They also have a notch at the bottom of the bag so once you seal them, you can tear them open using the little notch. Never had any problems with them letting air in or getting freezer burn.I’ve ordered and re-ordered these bags several times now since getting my food vacuum sealer, a Weston unit. I’ve used and have on hand pint, quart, and gallon sizes and all work well in the Weston. The pint bags especially work for us for individual hamburgers. We grill burgers from a frozen state to ensure a nice grilled outside while still being pinkish on the inside for flavor and texture. We’ve sealed and frozen a lot of different foods from proteins to veggies, cheeses, cookie and bread doughs, and so on. These bags have never once leaked in several years of using them, freezer burn has been eliminated, and food texture and taste well-preserved.Also, the vendor, FoodVacBags, of these has always been on top of the order notifying of any stock out or delivery delays we might expect. Even better, that’s only happened once during a major East Coast storm.These pint bags are sealed on 3 sides, one side is clear and the other textured, you can write anywhere on the bag with a sharpie marker, and they resist punctures from bones and sharp edges of your food very well even under the strong vacuum created by the Weston. Excellent product, well serviced.These bags are the best bargain around! They were recommended to me by a friend, so I tried them, and was not disappointed. Foodsaver bags can get a bit pricey, but I was a little concerned about the quality of a cheaper brand, so I figured I could use them on food where an air leak was not a big deal if they turned out to be inferior. Well, These bags rock! They are just as sturdy, just as thick, and vacuum out just as easily! They come in a poly bag that is sturdy enough to store them in, I don't have to worry about trying to store them neatly. But at the rate I am using them, that probably wouldn't be a problem.So far I have ordered the gallon, quart and now the pint size. I like the pint size so I can freeze individual servings of meat. I live alone, but I also don't have access to a store that is close by, so I buy good meats in bulk and freeze them. I also have relatives who give me treats of venison, so I pack that is single portions, and as "payment", bake homemade bread for those relatives, which I will pre-freeze and then vacuum seal in the gallon bags for when I see them again.This last shipment came a little more slowly, but that might be Amazon's fault, as I was ordering other items that they might have been waiting for to come in, so I can't really fault the company for that. I will certainly buy again.Buy these instead of the name brand... they are 99.5% as good. While the name brand does last longer and hold the air out a little itsy faction bit more they are almost 3Xs the cost. I've been using these for years and have never been disappointed. I used them for raw & cooked meats/proteins, sauces, soups, fresh made dough, just about anything. Items will stay fresh for up to a year, sometimes longer. FoodVac keeps the different items in stock and they ship WICKED fast - (which is a speed you can only experienced in Massachusetts) DON'T waste your hard earned money on the brand name. Get these NOW...!I use this for packing many things for my freezer. Perfect size for two people!! Love them!!I bought these over the brand name bags due to price per unit. These are substantially less than the brandname ones and they are just as good. For the price of 32 brandname ones, I get 100 of these!The only thing that I can find different on them is that the don't have a printed area for you to write on like the brandname ones do. I will be buying these from now on.I wasn't sure. I use them for sous vide so I can store cooked portion right out of the ice bath into the freezer. They could be a bit longer so I could fold over the top so as to not get it dirty when filling.Over all, so far, a good size and quality.Definitely can feel a difference in quality from the Foodsaver branded bags, BUT these still do the job most of the time. I don't use them for things that are fat or odd shaped because they are a less flexible plastic than the brand name bags, so they don't mold to the food as easily.As some other people have noted, occasionally some won't work. Of the ~25 I've used so far, 1 didn't work. And others also said some don't seal as well. I haven't had that issue but my recommendation is to double seal the edge, as I do with the brand name bags too. Think about how wide the seal is around the other 3 edges of the bag, and you think the seal you are making which is a fifth as thick is going to work as well? Right, so it never hurts to double the seal.